package com.pw.study;

/**
 * @Author: linux_future
 * @since: 2022/3/14
 **/
public class Hello {
    public static void main(String[] args) {
        int[] arr ={1,2,3,4,5,6,7};
        String str="abcdfg";
        int b = str.indexOf('b');
        System.out.println(b);
        System.out.println("================");

    }


}
